Hopefully someone here can give me a direction to go...
My new 482FE build is using Mass-Flo injection, which is essentially the injection system from the '89-'95 5.0.
I'm having a major problem with timing ( I think). The distributor wiring harness has a "spout" connector, which enables the computer to handle ignition advance.
With the "spout" connector removed, my engine starts fine, idles fine, has rock solid base timing. Mass-Flo recommends a base timing of 14* without the spout, which should jump to about 22-24* with the spout. With my engine idling happily at about 950 rpm and 14* initial, I insert the spout connector, and the motor dies. The timing becomes erratic, the engine misfires. When I watch it with my timing light, it almost seems like the computer is dumping in loads of advance and causing misfiring.
Like I said, with the computer controlled advance disabled, the motor runs really well, revs well (albeit slowly), with very stable timing. I'm getting 8-9" of vacuum, which may be a little low, but shouldn't affect ignition advance, I don't think, as this F.I. system doesn't directly measure manifold vacuum anyway.
I've double checked the distributor installation. I have spoken to Mass-Flo. That's all I really want to say about that.
I may try posting at EECTuner.org as well, but I know we have some real geniuses here as well...
Any help would be appreciated.
phil
Mass Flo / Ford Mustang F.I. help needed
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